Apparatus for drying charcoal.



No. 871mm PATENTED Nov. 19, 1907.

R. s. KENT; l APPARATUS POR DRYINGUHARCOAL.

" APPLIOATION FILED FEB.4.19'07.

ROBERT S. KENT, OF BROOKLYN, NEW.YORK.

APPARATUS FOR DRYING CHARCOAL.

Noqsrmoa Specification of Letters Patent.

Patented Nov. 19, 1907..

Application filed February 4. 1907. Serial No. 355600.

T o `all 'whom'it may concern: y .l

Be it known thatl, ROBERT S; KENT, a citizen of the United States, and a resident V-of' Brooklyn, in the county of Kings and State of New York, have invented certain as a 1decolorizing agent, particularly in the process of refining sugar.

The `principal object of this invention is to thoroughly dry wet char as it flows down a horizontally-corrugated wall or walls of a char-drier and forms with the walls of the rentrant angles of such corrugations ventilating passages, the desired result being attained by me by 'providing Ventilating outlets in the Walls of said rentrant angles l.,g'and by providing also suitable means for i cireulatin a gaseous drying medium through "25,

" l ends thereof, over the surface of the wet the' vent` ating passages from one or both char,and out through the Ventilating out- 'lets, instead of circulating such a medium' l through such ventilating passages from one lend tothe other thereof, as has heretofore usually beendone, or through the wet char as has heretofore been frequently but unsuccessfully attempted.

Inthe drawings' accompanying this specication I have illustrated an apparatus embodying the main feature of my invention bjust gstated, and also certain subordinate features which will be hereinafter described lviewbeing a central vertical section and the left-hand .side beingl a section in the line 2 2, Fig. 1'. 3 is an enlarged section similar to Fig. 1, of the upper portion of the char-drier.v Fi .4 is an enlarged diagrammaticyview il ustrating a char-,drierl and means fordrawingoff vapors,- etc. from the wet char in the drier. i

Similar characters designate like parts` in' all 4the figures of the drawings.

one, though of great width.

.In carrying into effect myL invention I will or` may make use of tho well-known elements of a char-drying apparatus. Among these are a kiln, such as 2, of any suitable type, located under the char-drier proper and so constructed as to contain and heat' a serios of retorts, such as 3, which are also, as shown, of well-known construction. Around the lower portions of the retorts 3 is another main element of such an apparatus, to wit, a cooling chamber, such as 4, formed in any well-known manner. Near the to of the kiln may also be located, as is usua chambers such as 5 for the reception ofthe dried char until it is passed into the retorts 3 to be revivified by reburning in said retorts.

The char-drier proper preferably constitutesan upper extension of the outlet for waste products of. combustion from the kiln and is best constructed as a casing, through which such products of combustion may circulate back and forth endwise of the drier in a zigzag path from the bottom to the top' of the same. This char-drier is designated generally by 6. 4It is in the construction shown a relatively high substantially vertical casing decreasing in cross-sectional area from the bottom to the top of the ap aratus, and of considerable width endwise o the side-walls but relatively narrow between such side-walls.

` At least one and preferably both of these sidewalls of the casing is horizontally corrugated to form a wall which is zigzag in vertical section and has rentrant angles. adapted to form Ventilating passages. These features of construction are wel understood. The

casing of the chardrier shown here, has two` larly Fig. 3) in descending a side-wal of this zigzag type forms with the rentrant portions of the casing horizontal passages, such as 8, the area of which is determined by the angles of the side-walls of the corrugation and by the {low-line of the wet or partiall dried char. I combine with such a side-wa l' or side-walls as illustrated at 7, suitable means for forming with said zigzafr side-wall or side-walls one or more passages for permitting the descent of a zigzag stream of char. These parts are so formed and disposed that the stream of char descendingbetween the coperating surfaces is a comparatively thin ployed for forming such a zigzag stream or The means emstreams of descending charv are or may be the same as heretofore used, that is, they may be one or more'series of plates, such as 9, se cured to suitable supports 10, at the upper 5 ends of which may be formed the usual hopper or hoppers for receiving in bulk the moist char. In thev dran-ings two hoppers are shown as formed by diVerging u pper portions 11 of the side-walls of the drier and by plates, such as 12, secured to the supports 10. The principal feature which distinguishes t-heconstruction of the side-walls of the drier from the side-walls of other apparatus for drying char is openingsin the walls of the 15 Ventilating passages, these openings constituting Ventilating outlets. These Ventilating outlets through the walls of the reutran'.

angles of one or more side-walls of the drier are preferably at the centers of the Ventilat# ing passages' and are'of' considerable area, they being of sufficient size to permit the free exit of the Ventilating medium therethrough. These Ventilating outlets are preferably formed as shown in Figs. 2 and 3, 1n the upper or horizontal wall of each rentrant an gle, the outlet being of considerable length though relatively narrow. The Ventilating passages 8 are open at both ends of the drier and are preferably covered by end-casings,

which may be of any suitable type. Here I have shown two end-casings each of which covers all of the Ventilatin passages at its end of the drier. These en -casings are designated generally by 14. Through these end-casings the gaseous drying medium may be circulated through the Ventilating passages from both ends of the drier and out through the lVentilating outlets 13. For this purpose heated air will be taken from some 40 suitable part of the apparatus, referably from the usual oint, to wit, from t Le cooling chamber 4, an pass through suitable pipes 15 into the end-casings 14.' This heated air may be drawn through the Ventilating pas- -45 sages in any one or moreof Various wellknown ways, as for example, by'v natural draft through a stack indicated diagrammatically 'at 22, or by forced' draft through a suce tion fan, indicated diagrammatically at 23,

or in both of these way s, or in any other manner. Preferably the streams of airare circulated through these Ventilating passages and have their outlet through the openings 13, are delivered directly into the interior of the casing constituting the main element of the drier, as indicated by the arrows in Fig. 3, and therefore pass, mingled with the waste products of combustion, through the interior of the casing to the usual outlet, such as 16,

A for such waste products from the liln, and

are exhausted, through a flue, such as 24, either by way of the stack or the fan, or both, as may be desired, and as maybe determined by the proper setting of gates or Valves, such 65 as25, 26 and27. v

said Ventilating outlets.

y I In order to utilize most eectiVely the heat of the waste products of combustion I preferl in this, as in previous apparatus of this type, to provide a series of superposed' partitions,

such as 17, 1S, 19, 20 and 21, disposed sub- '70.A

stantially horizontally inthe casing, of the char-drier. These partitions have openings (not shown) at their opposite ends alternately for thepurpose of prolongin the time occupied by the waste products of combus- 75. tion in passing over the inner surfaces' of the side-walls 7 out of contact with thechar, and consequently utilizing the full heating effect of the waste products. .Y f

What I claim is: .1. In an apparatus for drying charcoaL-'thev combination with a -horizontally corrugated wall forming rentrant'angles the wallsof `which have Ventilating outlets therethrough and form with a downwardly iiowing body.

of char horizontal Ventilating passages,v of means for circulating a gaseous .drying ine-v dium part way through' said Ventilating passages and out through said Ventilating outlets. l Y

2. In an apparatus for drying charcoal, the combination with a horizontally corrugated wall forming re'ntrant angles thewalls of which have. substantially central Ventilating outlets therethrough and form with` a downwardly flowing body of charhorizontal Ventilating passages, of means for circulating a' gaseous drying medium part way vthrough said Ventilating passages and out through said Ventilating outlets.

3. In an apparatus vfor drying charcoal, the combination with a horizontally corru ated wall forming rentrant angles the wa ls of ioo which haVeVentilating outlnets therethrough and form with a downwardly flowing body of char horizontal Ventilating passages, of means for circulating a gaseous drying medium part way through said Ventilating passages from both ends thereof and out through 110 4. In an apparatus for drying charcoal, the combination with a horizontally corrugatedl wall forming rentrant angles the walls of which h aVe substantially central `Ventilatingr outlets therethrough and form with a down-v wardly flowing .body of char horizontal Ventilating passages, of means for circulating a gaseous drying medium part way through said Ventilating passages from both ends thereof and out through said Ventilating out'- 120 .i

lets.

- 5. In an apparatus for drying'charcoal, the combination with a pairof opposed herizontally corrugated walls each forming rentrant angles the walls of which have Ventilating outlets therethrough and form 'with two downwardly flowing streams of char two se ries' of horizontal Ventilating passages, 'of means for circulating a gaseousdrying inediurn part way through said Ventilating passages of both series' and out through said Ventilating outlets.

6; In an apparatus for drying charcoal, the combination with a air of opposed horizontally `corrugated wallie each forming rentrant angles the Walls of which have Ventilating outlets therethrough and form with two downwardly flowing streams of char two series `of horizontal Ventilating passages, of means foreireulating a gaseous drying medium part way through said Ventilating passages of both series from. both ends of said passages and out through said Ventilating y i outlets.

7.' In an apparatus for drying charcoal, the combination with a easing having a horizon- Itallyjeorruo'ated wall forming rentrant an gles the waxlls of which have Ventilating out letsthe'rethrou h and form with a downv-Wardly flowing ody of char horizontal Ventilating passages, of means for circulating a gaseous drying n ledium through said easing I out of Contact with said char and also part Way through said Ventilating passages in eontac-,t with the char and thence out through said Ventilating outlets.

8. In an apparatus for drying charcoal, the

combination with a horizontally eorru ated Wall forming rentrant angles the wa ls of which have Ventilating outlets therethrough and form with a downwardlyilowing body of char horizontal Ventilating passages, of a pair of end-easings inelosing the open ends of said Ventilating passages, and means for circulating a gaseous drylng medium from said end-easings through said Ventilating pas-` saves and outlets.

tigned at oity of New York, in the count-y of New York and State of4 N ew York, this 2d day of February, A. 1907.

v ROBERT S. KENT. Witnesses: EDGAR A. FELLoWs, C. S. CHAMPION. 

